What Does The Tuttnauer Door Bellows Do?

The Door Bellows on Tuttnauer 3870E Autoclaves is a safety device that prevents the door from opening when the chamber is pressurized.

How The Tuttnauer Door Bellows Works

The system utilizes the buildup of pressure inside the autoclave chamber to expand a flexible Silicon-Rubber bellows. The bellows pushes a metal pin into a grove on the tightening bolt of the Door Closing Device.

This prevents the operator from opening the door when there is pressure in the chamber. When the steam is released, this bellow returns to its original position, drawing the pin with it and releasing the tightening bolt.